Weldments of HY-80 are noted for good ductility, notch toughness, and strength. It is recommended to weld using the metal-arc process with low hydrogen electrodes of Type E-10018 or E-11018. It is important to use approved weld procedures, so that the correct heat input per inch of weld bead is introduced, which would otherwise cause degradation of notch toughness. Hybrid Laser Arc Welding of HY-80 SteelLaser-assisted gas metal arc welding of HY-80 steel was investigated. The effect of welding parameters was studied and optimum welding conditions were identified.
The study was conducted to evaluate the impact toughness of flux-cored arc welded of SM570-TMC steel joint under different heat inputs, 0.9 kJ/mm (low heat input) and 1.6 kJ/mm (high heat input). Welding wire containing 0.4%Ni was selected on this experiment. Multi-pass welds were performed on SM570-TMC steel plate of 16 mm in thickness with a single V-groove butt joint on flat position (1G). Initial testing for the recommendation of improved gas INITIAL TESTING FOR THE RECOMMENDATION OF IMPROVED GAS METAL ARC WELDING PROCEDURES FOR HY-80 STEEL PLATE BUTT JOINTS AT NORFOLK NAVAL SHIPYARD Veronika J. Rice Lieutenant, United States Navy B.S., University of San Diego, 2006 Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN MECHANICAL ENGINEERING Initiation and growth of microcracks in high strength First, 1 inch thick HY-80 and HY-100 base plates were multipass, spray gas metal arc welded (GMAW) with overmatching and undermatching filler metal using a semiautomatic welding machine. Second, 1/4 inch thick MIL-A-46100 high hardness armor plates (HHA) were manually, two pass spray GMAW welded with two grades of undermatching consumables.
Abstract. In this present work, the inuence of different consumables on weld properties of carbon steel plate was studied by automatic gas metal arc welding under constant voltage mode. For all experiments, the process parameters such as welding current of 200 A, voltage of 28 V and welding speed of 200 mm/min were kept constant. Investigations on the impact toughness of HSLA steel arc Jan 01, 2016 · The impact toughness of HSLA steel weld joints fabricated by arc welding processes was studied. The influence of inclusions and microstructural characteristics of SMAW, SAW, FCAW and A-GTAW on the toughness of the weld metals were investigated. The inclusion size, area fraction and number density were analyzed using image analysis software. Mechanical properties and microstructure of SMAW welded Oct 01, 2018 · The author found that the plots are acceptable for predicting the influence of microstructure on the combination of strength and toughness. Durmusoglu et al. indicated that HSLA-80 steel joined by gas metal arc weld presents the strength of both weld metal and heat affected zone (HAZ) higher than that of the base metal. As for the microstructure, the authors indicated that martensite
This work investigated microstructure and impact toughness of multi-pass flux-cored arc welded SM570-TMC steel. A comparison was made between weldments fabricated with average heat input of 0.9 kJ/mm and 1.4 kJ/mm, respectively. SM570 steel plate with 16 mm nominal thickness and 1.2 mm diameter of E81-Ni1 flux-cored wire were selected in this experiment. Microstructure and hardness properties of butt and fillet The material used in this research is high strength steel HY-80 welded with gas metal arc welding (GMAW) method using 90% Ar + 10% CO 2 shielding gas and ER100S welding wire. Both butt and fillet weld joint types were applied. The results show the highest hardness was observed at CGHAZ for both butt and fillet weld. The effect of titanium inclusions on HY-80 GMA weld HY-80 steels are used in submarine and ship construction and it has been found that small additions of titanium to this steel during manufacture markedly improve the fracture toughness of the heat affected zone (HAZ) of Gas-Metal-Arc-Welding (GMAW) deposits made from this steel. This has been ascribed to prior austenite grain boundary pinning by titanium nitride inclusions.
The material characteristics of high toughness and high strength in steel are usually not available at the same time. However, it would be an advantage if high-strength steels would show high impact toughness also at lower temperatures for applications in critical surroundings. In this paper, an approach of multi-layer welding of high-strength steel is presented in order to increase the weld Welding-HY-Steels for special naval requirementsWelding-HY-Steels refers to processing a family of steels that owe their name to High Yield Strength.. This was the main property designed into the materials as they were developed in the form of thick plates.. That occurred in the sixties of the past century, at the request of the US Navy, mainly for fabrication of ship hulls and submarines.. Within this class, that includes HY-80, HY-100, HY Welding-HY-Steels for special naval requirementsWelding-HY-Steels refers to processing a family of steels that owe their name to High Yield Strength.. This was the main property designed into the materials as they were developed in the form of thick plates.. That occurred in the sixties of the past century, at the request of the US Navy, mainly for fabrication of ship hulls and submarines.. Within this class, that includes HY-80, HY-100, HY
Unsatisfactory weld toughness in submerged arc welded (SAW) 4- HY-100 steel weldments precludes this process from large 4. scale HY-100 shipbuilding production efforts. The gas metal arc welding (GMAW) process produces acceptable weidments in HY-100 steel